package thread;

import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadPoolDemo {
    public static void main(String[] args) {

        ExecutorService threadPool = Executors.newFixedThreadPool(3);
        for (int i = 0; i < 5; i++){
            Runnable r=()-> {
                    try {
                        Thread t=Thread.currentThread();
                        System.out.println(t.getName()+"；正在执行一个任务.....");
                        Thread.sleep(5000);
                        System.out.println(t.getName()+"执行任务完毕....");
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }

            };
            threadPool.execute(r);
            System.out.println("一个任务开始执行");

        }
        threadPool.shutdown();

    }
}
